سورة Al-Baqarah ( The Cow ) - الآية 237

And if you divorce them before the consummation of marriage, but after settling the dowry, then half the settled dowry must be paid, unless the woman forgoes it, or the person who holds the bond of marriage pays the full amount. And if the man pays the whole, it is nearer to piety. But do not forget to be good to each other, and remember that God sees all that you do.